VDB-229119 · CVE-2023-20695 · ALPS07734012

MediaTek MT8797 Preloader out-of-bounds write

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.8	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in MediaTek MT6835, MT6880, MT6886, MT6890, MT6980, MT6985, MT6990, MT8167, MT8175, MT8185, MT8195, MT8321, MT8365, MT8385, MT8395, MT8666, MT8667, MT8673, MT8675, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8791T and MT8797. Affected by this vulnerability is an unknown functionality of the component Preloader. Performing a manipulation results in out-of-bounds write. This vulnerability is cataloged as CVE-2023-20695. The attack must be initiated from a local position. There is no exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in MediaTek MT6835, MT6880, MT6886, MT6890, MT6980, MT6985, MT6990, MT8167, MT8175, MT8185, MT8195, MT8321, MT8365, MT8385, MT8395, MT8666, MT8667, MT8673, MT8675, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8791T and MT8797 (Chip Software). It has been classified as critical. This affects some unknown functionality of the component Preloader. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In preloader, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS07734012 / ALPS07874363 (For MT6880, MT6890, MT6980 and MT6990 only); Issue ID: ALPS07734012 / ALPS07874363 (For MT6880, MT6890, MT6980 and MT6990 only).

The weakness was shared 05/16/2023 as ALPS07734012. It is possible to read the advisory at corp.mediatek.com. This vulnerability is uniquely identified as CVE-2023-20695 since 10/28/2022. The technical details are unknown and an exploit is not publicly available.

Applying the patch ALPS07734012 is able to eliminate this problem.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Chip Software

Vendor

MediaTek

Name

License

commercial

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.7
NVD Vector: 🔍

CNA Base Score: 6.7
CNA Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: ALPS07734012

Timelineinfo

10/28/2022 🔍
05/16/2023 +200 days 🔍
05/16/2023 +0 days 🔍
01/24/2025 +618 days 🔍

Sourcesinfo

Advisory: ALPS07734012
Status: Confirmed

CVE: CVE-2023-20695 (🔍)
GCVE (CVE): GCVE-0-2023-20695
GCVE (VulDB): GCVE-100-229119

Entryinfo

Created: 05/16/2023 08:14
Updated: 01/24/2025 00:45
Changes: 05/16/2023 08:14 (41), 06/09/2023 11:30 (11), 01/24/2025 00:45 (26)
Complete: 🔍
Cache ID: 216::103